- بطارية ليثيوم 12 فولت
- بطارية ليثيوم 24 فولت
- بطارية ليثيوم 36 فولت
- بطارية ليثيوم 48 فولت
حزمة بطارية مخصصة
- بطارية ليثيوم بوليمر منحنية
- بطارية بوليمر سريعة الشحن
- بطارية ليثيوم بوليمر مرنة
- بطارية بوليمر رفيعة للغاية
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By hoppt
طورت مجموعة من العلماء الدوليين نوعًا جديدًا من بطاريات الحالة الصلبة التي يمكن أن تزيد من نطاق السيارات الكهربائية وتمنع اندلاع حرائق في أجهزة الكمبيوتر المحمولة والهواتف الذكية. يصف المؤلفون النتائج التي توصلوا إليها في مواد الطاقة المتقدمة. من خلال استبدال الإلكتروليتات السائلة المستخدمة في البطاريات التقليدية القابلة لإعادة الشحن بأخرى خزفية صلبة ، فإنهم قادرون على إنتاج بطاريات أكثر فاعلية وطويلة الأمد وأكثر أمانًا أيضًا للاستخدام. يأمل الباحثون أن تمهد هذه المزايا الطريق لبطاريات أكثر كفاءة وصديقة للبيئة لجميع أنواع الأجهزة بما في ذلك السيارات الكهربائية.
كان مؤلفو الدراسة ، من الولايات المتحدة والمملكة المتحدة ، يستكشفون بدائل للإلكتروليتات السائلة في بطاريات أيونات الليثيوم. في عام 2016 ، أعلنا عن تطوير بطارية صلبة يمكن أن تعمل بأكثر من ضعف الجهد الكهربي لخلايا أيون الليثيوم التقليدية ، ولكن بكفاءة مماثلة.
في حين أن تصميمهم الأخير يمثل تحسينًا كبيرًا عن هذا الإصدار السابق ، يشير الباحث البروفيسور دونالد سادواي من معهد ماساتشوستس للتكنولوجيا إلى أنه لا يزال هناك مجال للتحسين: "قد يكون تحقيق الموصلية الأيونية العالية في مواد السيراميك في درجات حرارة مرتفعة أمرًا صعبًا" ، كما أوضح. "كان هذا إنجازا كبيرا." يأمل الباحثون بعد اختبار هذه البطاريات المحسّنة أن تثبت أنها مناسبة للسيارات الكهربائية أو حتى لتشغيل الطائرات.
في حالة البطاريات الصلبة ، يتم منع التلف الناتج عن ارتفاع درجة الحرارة باستخدام إلكتروليتات خزفية بدلاً من السوائل القابلة للاشتعال. في حالة تلف البطارية وبدأت في التسخين الزائد ، يتفحم الإلكتروليت الخزفي بدلاً من الاشتعال ، مما يمنعه من الاشتعال. كما أن المسام الموجودة في بنية هذه المواد الصلبة تمكنهم من حمل شحنة كهربائية أعلى بكثير مع حركة الأيونات عبر شبكة ممتدة داخل المادة الصلبة.
تعني هذه الميزات أن العلماء تمكنوا من رفع الجهد والسعة لبطارياتهم مقارنة بتلك التي تحتوي على إلكتروليتات سائلة قابلة للاشتعال. قال البروفيسور سادواي: "لقد أظهرنا خلية ليثيوم هوائية بقوة 12 فولت تعمل عند 90 درجة مئوية [194 درجة فهرنهايت]. وهذا أعلى مما حققه أي شخص آخر."
هذا التصميم الجديد للبطارية له مزايا أخرى محتملة على الشوارد القابلة للاشتعال ، بما في ذلك حقيقة أن الإلكتروليتات الخزفية أكثر استقرارًا بشكل عام من الإلكتروليتات العضوية. قال البروفيسور سادواي: "الشيء المدهش هو مدى نجاحه". "لقد حصلنا على طاقة من هذه الخلية أكثر مما نضعه فيها."
يمكن أن يسمح هذا الاستقرار للمصنعين بتعبئة أعداد كبيرة من خلايا الحالة الصلبة في أجهزة الكمبيوتر المحمولة أو السيارات الكهربائية دون الحاجة إلى القلق بشأن ارتفاع درجة حرارتها ، مما يجعل الأجهزة أكثر أمانًا ويطيل عمرها الوظيفي. في الوقت الحالي ، إذا ارتفعت درجة حرارة هذه الأنواع من البطاريات ، فإنها تتعرض لخطر الاشتعال - كما حدث مؤخرًا مع هاتف Samsung Galaxy Note 7. لن تتمكن ألسنة اللهب الناتجة من الانتشار بسبب عدم وجود هواء داخل الخلايا للحفاظ على الاحتراق ؛ في الواقع ، لن يكونوا قادرين على الانتشار خارج موقع الضرر الأولي.
هذه المواد الصلبة طويلة الأمد أيضًا ؛ على النقيض من ذلك ، فإن بعض المحاولات لصنع بطاريات أيونات الليثيوم مع إلكتروليتات سائلة قابلة للاشتعال ، والتي تعمل في درجات حرارة أعلى (أكثر من 100 درجة مئوية) تشتعل فيها النيران بشكل روتيني بعد 500 أو 600 دورة. يمكن للإلكتروليتات الخزفية أن تتحمل أكثر من 7500 دورة شحن / تفريغ دون اشتعال النيران. "
قد تكون النتائج الجديدة مهمة للغاية لتوسيع نطاق المركبات الكهربائية ومنع حرائق الهواتف الذكية. وفقًا لـ Sadoway: "الأجيال الأقدم من البطاريات كانت تحتوي على بطاريات بدء تشغيل حمض الرصاص [للسيارة]. كانت ذات مدى قصير لكنها موثوقة بشكل لا يصدق" ، كما قال ، مضيفًا أن ضعفها غير المتوقع كان "إذا ارتفعت درجة حرارتها عن 60 درجة مئوية عندئذٍ. ستشتعل فيه النيران ".
وأوضح أن بطاريات أيونات الليثيوم اليوم هي خطوة للأمام. وقال "لديهم مدى طويل لكن يمكن أن يتضرروا بسبب ارتفاع درجة الحرارة الشديدة والاشتعال" ، مضيفًا أن بطارية الحالة الصلبة الجديدة من المحتمل أن تكون "اختراقًا أساسيًا" لأنها قد تؤدي إلى أجهزة أكثر موثوقية وأمانًا.
يعتقد العلماء في معهد ماساتشوستس للتكنولوجيا أن هذه التكنولوجيا قد تستغرق خمس سنوات لتصبح مستخدمة على نطاق واسع ولكن حتى في وقت مبكر من العام المقبل يأملون في رؤية هذه الأنواع من البطاريات مثبتة في الهواتف الذكية من كبرى الشركات المصنعة مثل Samsung أو Apple. وأشاروا إلى أن هناك استخدامات تجارية كثيرة لهذه الخلايا إلى جانب الهواتف المحمولة من أجهزة الكمبيوتر المحمولة والمركبات الكهربائية.
ومع ذلك ، يحذر البروفيسور سادواي من أنه لا يزال هناك بعض الطريق لنقطعه قبل إتقان التكنولوجيا. "لدينا خلية تبدو ممتازة حقًا ، لكنها ما زالت مبكرة جدًا... ولا يزال يتعين علينا تصنيع خلايا ذات أقطاب كهربائية كبيرة الحجم وذات طاقة عالية الكثافة."
يعتقد Sadoway أن هذا الاختراق سيتم اعتماده على نطاق واسع على الفور لأنه يمتلك القدرة ليس فقط على تزويد المركبات الكهربائية بمدى أكبر بكثير ولكن يحتمل أيضًا منع حرائق الهواتف الذكية. ربما يكون الأمر الأكثر إثارة للدهشة هو توقعه بأن بطاريات الحالة الصلبة يمكن أن تُستخدم عالميًا في أقل من خمس سنوات بمجرد اقتناع معظم الشركات المصنعة بسلامتها وموثوقيتها.
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